How To Wire My Thermostat December 31, 2018 Wiring . diy.stackexchange.comHeat only 2. This article applies to the ecobee3, ecobee3 lite, and ecobee4 ecobee thermostats require a C (common) wire to power on. If you only... support.ecobee.com 4 Way To 7 Way Trailer PlugLighted Toggle Switch Wiring Diagram4 Way Trailer Wiring Harness3 Plug OutletPlasma Tv DiagramHow To Wire A RelayPentair Intellibrite Controller Wiring DiagramMaytag 4 Prong Dryer Cord Installation